新显色剂对氨磺酰基苯基重氮氨基偶氮苯测定煤渣及粉煤灰中的痕量镉  

Spectrophotometric determination of trace Cadmium in coal cinder and coal ash by the new Chromogenic reagent-P-Sulfamoyl-benzene diazoaminoazobenzene

作　　者：王永丰[1] 何家红[1] 

机构地区：[1]淮北煤炭师范学院化学系

出　　处：《淮北煤师院学报（自然科学版）》1991年第3期33-38,共6页Journal of Huaibei Teachers College(Natural Sciences Edition)

摘　　要：本文报道了新显色剂对氨磺酰基苯基重氮氨基偶氮苯与Cd(Ⅱ)的显色反应,在TritonX-100的存在下,在pH10.0的硼砂和氢氧化钠缓冲溶液中,该试剂与Cd(Ⅱ)可生成1∶3的红色配合物,其最大吸收波长位于480nm 处,摩尔吸光系数为1.07×10~5l·mol^(-1)·cm^(-1) ,镉的含在0-0.6μg/ml 范围内遵守朗伯-比耳定律,将该方法用于测定煤渣及粉煤灰中的痕量镉,结果满意。The spectrophotometric reaction of the new Chromogenic reagent-P-Sulfamoyl-benzene diazoaminoazobenzene with Cadmium(Ⅱ)has been reported in this paper,In the presence of Triton X-100 and bo- raxsolation at pH10. 0 the reagent reacts with Cd(Ⅱ)to form a red complex with a molax ratio of 1:3 which has a maximum absorption at 480um.The molar absorptivity is 1. 07×10~5l·mol^(-1) ·cm^(-1) .Beer's law is obeyed for Cd(Ⅱ)in tha range of 0-0. 6μg/ml.The method has been applied to determine Cd(Ⅱ)in coal Cinder and Coal ash with Satisfactory results.

关 键 词：镉 煤渣 粉煤灰 显色剂 偶氮苯 

分 类 号：O614.242[理学—无机化学]